Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10548053 | Journal of Chromatography A | 2005 | 6 Pages |
Abstract
A novel method for speciation analysis of inorganic arsenic was developed by on-line hyphenating microchip capillary electrophoresis (chip-CE) with hydride generation atomic fluorescence spectrometry (HG-AFS). Baseline separation of As(III) and As(V) was achieved within 54 s by the chip-CE in a 90 mm long channel at 2500 V using a mixture of 25 mmol lâ1 H3BO3 and 0.4 mmol lâ1 CTAB (pH 8.9) as electrolyte buffer. The precisions (RSD, n = 5) ranged from 1.9 to 1.4% for migration time, 2.1 to 2.7% for peak area, and 1.8 to 2.3% for peak height for the two arsenic species at 3.0 mg lâ1 (as As) level. The detection limits (3Ï) for As(III) and As(V) based on peak height measurement were 76 and 112 μg lâ1 (as As), respectively. The recoveries of the spikes (1 mg lâ1 (as As) of As(III) and As(V)) in four locally collected water samples ranged from 93.7 to 106%.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Feng Li, Dong-Dong Wang, Xiu-Ping Yan, Rong-Guo Su, Jin-Ming Lin,